1540877943 has 16 divisors (see below), whose sum is σ = 2373117696. Its totient is φ = 878931840.

The previous prime is 1540877911. The next prime is 1540877959. The reversal of 1540877943 is 3497780451.

It is a happy number.

It is not a de Polignac number, because 1540877943 - 2⁵ = 1540877911 is a prime.

It is a super-2 number, since 2×1540877943² = 4748609670447822498, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1540877892 and 1540877901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540877963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1372771 + ... + 1373892.

It is an arithmetic number, because the mean of its divisors is an integer number (148319856).

Almost surely, 2^1540877943 is an apocalyptic number.

1540877943 is a deficient number, since it is larger than the sum of its proper divisors (832239753).

1540877943 is a wasteful number, since it uses less digits than its factorization.

1540877943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2746694.

The product of its (nonzero) digits is 846720, while the sum is 48.

The square root of 1540877943 is about 39254.0181764874. The cubic root of 1540877943 is about 1155.0197564132.

The spelling of 1540877943 in words is "one billion, five hundred forty million, eight hundred seventy-seven thousand, nine hundred forty-three".